CVE-2019-2086

Vulnerability

In libxaac, the Android audio decoder library, an out-of-bounds write occurs due to a missing bounds check. This vulnerability affects Android 10 devices with a security patch level before 2019-09-01. The issue is identified by Android ID A-114735603 and is addressed in the Android 10 release [1].

Exploitation

An attacker can exploit this vulnerability by crafting a malicious media file that triggers the out-of-bounds write when processed by libxaac. User interaction is required, such as opening the malicious file or receiving it via a messaging app. No additional execution privileges are needed beyond normal user access [1].

Impact

Successful exploitation leads to remote code execution within the context of the media server process. This could allow an attacker to execute arbitrary code, potentially leading to full device compromise, including access to sensitive data or further system control [1].

Mitigation

The vulnerability is fixed in Android 10 as released on the Android Open Source Project (AOSP) with a default security patch level of 2019-09-01. Devices with a security patch level of 2019-09-01 or later are protected. Users should ensure their devices receive the latest Android security updates [1].